Apple has unveiled Safari 5, touting a few upgraded features and a shiny new extension gallery. Bug fixes, a streamlined viewer experience and Bing search are among the primary areas of improvement.

Nothing drastically changed from previous Safari renditions, but Apple may be further alienating display marketers with its new Reader. An option to ditch ads from online publications (Safari will detect when you’re reading an online article) clears the clutter, but takes another swipe at advertisers already miffed by Apple’s battles against Flash.

Increased HTML5 support may sooth some of those soured, including video enhancements and default geo-location standards. Safari’s new extension gallery will also reap the benefits of the added HTML5 support–you’ll find a few of the featured add-ons have HTML5 perks.

The inclusion of Bing search is another known update with Safari 5’s release, opening one of the planned portals for the widespread distribution of Microsoft’s search engine. After Yahoo Japan announced Google as its new search alliance instead of Bing, its presence on Apple devices won’t hurt.

The updates for Safari come after gains from competing browsers; Firefox and Chrome have both seen notable growth in the past six months. An increase in scheduled updates for both Firefox and Chrome has raised expectations around browser usability and navigation, though Firefox is already getting behind. A sneak peek at the upcoming Firefox 4 tab candy shows Mozilla’s desire to change more than just our viewing experience of the web.